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-rw-r--r--src/devices/bus/vic20/4cga.cpp113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/devices/bus/vic20/4cga.cpp b/src/devices/bus/vic20/4cga.cpp
new file mode 100644
index 00000000000..67901823065
--- /dev/null
+++ b/src/devices/bus/vic20/4cga.cpp
@@ -0,0 +1,113 @@
+// license:BSD-3-Clause
+// copyright-holders:smf
+/**********************************************************************
+
+ Classical Games/Protovision 4 Player Interface emulation
+
+ http://www.protovision-online.com/hardw/4_player.htm
+ http://hitmen.c02.at/html/hardware.html
+
+**********************************************************************/
+
+#include "4cga.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C64_4CGA = &device_creator<c64_4cga_device>;
+
+
+static INPUT_PORTS_START( c64_4player )
+ PORT_START("JOY3")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy3_0)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy3_1)
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy3_2)
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy3_3)
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, device_pet_user_port_interface, output_h)
+ PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("JOY4")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy4_0)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy4_1)
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy4_2)
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy4_3)
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, device_pet_user_port_interface, output_j)
+ PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED )
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor c64_4cga_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( c64_4player );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// c64_4cga_device - constructor
+//-------------------------------------------------
+
+c64_4cga_device::c64_4cga_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C64_4CGA, "C64 Protovision 4 Player Interface", tag, owner, clock, "c64_4cga", __FILE__),
+ device_pet_user_port_interface(mconfig, *this),
+ m_port(0),
+ m_joy3(0xf),
+ m_joy4(0xf)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c64_4cga_device::device_start()
+{
+ // state saving
+ save_item(NAME(m_port));
+}
+
+//-------------------------------------------------
+// update_output
+//-------------------------------------------------
+
+void c64_4cga_device::update_output()
+{
+ UINT8 data;
+
+ if (m_port)
+ {
+ data = m_joy3;
+ }
+ else
+ {
+ data = m_joy4;
+ }
+
+ output_c((data>>0)&1);
+ output_d((data>>1)&1);
+ output_e((data>>2)&1);
+ output_f((data>>3)&1);
+}
+
+
+//-------------------------------------------------
+// c64_pb_w - port B write
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( c64_4cga_device::input_l )
+{
+ m_port = state;
+ update_output();
+}